[英]XStream - unmarshalling - Type specified in XML not visible
我剛才有一些XStream存儲的XML文件,它們包含對RandomAccessSubList的引用,這個類在包級別之外是不可見的,並且沒有默認構造函數,所以XStream拋出了這個錯誤:
com.thoughtworks.xstream.converters.ConversionException: Cannot construct java.util.RandomAccessSubList as it does not have a no-args constructor : Cannot construct java.util.RandomAccessSubList as it does not have a no-args constructor
---- Debugging information ----
message : Cannot construct java.util.RandomAccessSubList as it does not have a no-args constructor
cause-exception : com.thoughtworks.xstream.converters.reflection.ObjectAccessException
cause-message : Cannot construct java.util.RandomAccessSubList as it does not have a no-args constructor*
這是XML:
<customTimes class="java.util.RandomAccessSubList">
<l class="list">
<long>1302174300146</long>
<long>1302174305231</long>
<long>1302174310312</long>
等等
我不能只為RandomAccessSubList編寫一個轉換器,因為它在util包之外是不可見的。 如何告訴XStream忽略該屬性的類,或者如何為我無法引用的類指定轉換器?
提前致謝!
我找到了它的底部 - 結果xstream應該處理那個xml(它不需要一個no-args構造函數),問題出現了,因為我使用的是舊版xstream(1.3.1)的jdk 7。 請參見http://code.google.com/p/pitestrunner/issues/detail?id=4 。 回到jdk 6修復了問題(由於各種原因我無法升級)。
在我意識到我確實編寫了一個適用於RandomAccessSubList的轉換器之前,如果有人需要它:
public class RandomAccessSubListConverter extends CollectionConverter {
public RandomAccessSubListConverter(Mapper mapper) {
super(mapper);
}
@Override
public boolean canConvert(Class arg0) {
return arg0.getName().equals("java.util.RandomAccessSubList");
}
@Override
public Object unmarshal(HierarchicalStreamReader reader,
UnmarshallingContext context) {
reader.moveDown();
ArrayList arrayList = new ArrayList();
populateCollection(reader, context, arrayList);
reader.moveUp();
return arrayList;
}
感謝任何為我着想的人!
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